发明申请
- 专利标题： CRANKSHAFT OF INTERNAL COMBUSTION ENGINE PROVIDED WITH MULTI LINK-TYPE PISTON-CRANK MECHANISM AND MULTI LINK-TYPE PISTON-CRANK MECHANISM OF INTERNAL COMBUSTION ENGINE
- 专利标题（中）： 内燃机提供多连杆式活塞机构和内燃机多连杆式活塞式起重机构的内燃机起重机
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申请号： US13383744申请日： 2010-06-01
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公开(公告)号： US20120111143A1公开(公告)日： 2012-05-10
- 发明人: Takashi Tanabe , Makoto Kobayashi , Tsuyoshi Arinaga , Kenshi Ushijima
- 申请人： Takashi Tanabe , Makoto Kobayashi , Tsuyoshi Arinaga , Kenshi Ushijima
- 申请人地址： JP Kanagawa
- 专利权人： NISSAN MOTOR CO., LTD.
- 当前专利权人： NISSAN MOTOR CO., LTD.
- 当前专利权人地址： JP Kanagawa
- 优先权： JP2009-168674 20090717
- 国际申请： PCT/JP2010/059247 WO 20100601
- 主分类号： F02B75/32
- IPC分类号： F02B75/32 ; F01M1/08 ; F02B75/04 ; F01M1/06 ; F16C3/28 ; F16C3/14
摘要：
In a crankshaft of an internal combustion engine wherein a crankthrow is shortened by the use of a multi-link mechanism, the crankthrow from the axis of a main journal to the axis of a crankpin is set shorter than one-half of a piston stroke, and an oil passage is formed to supply lubricating oil to a bearing portion of the crankpin. The pin-side opening of the oil passage, which is open at the outer peripheral surface of the crankpin, is formed in ranges other than angular ranges of 0°, 90°, 180°, and 270° with respect to a reference line extending from the axis of the main journal toward the axis of the crankpin in a decentering direction of the crankpin, thereby alleviating a stress concentration caused by a torsional torque in the vicinity of the pin-side opening of the oil passage.
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